Valve-jack.



No. 852,145. PATENTED APR. 30, 1907 B. STEVENS. VALVE JACK.

AYPLIGATION FILED mum. 1907.

@Q Wm wfiw mad/g mm Q e6 w twi 1%, v W q M m v i g n" UNITED STATESERNEST STEVENS, OF CHICAGO, ILLINOIS.

VALV E-JACK- bl'c. 852,145.

Specification of Letters Patent.

Patented April 30, 1907.

Application filed March 4, 1907. Serial No- SBOAUS.

To all? whom it may concern:

Be it known that I, ERNEST STEVENS, a citizen of the United States,residing at Chicago, in the county of Cook and Stateof Illinois, haveinvented a certain new and useful Improvement in Valve-Jacks, of whichthe following is a specification.

The object of my invention is to provide means for controlling the valveassociated, for example, with a gas engine, so that the same can beremoved and cleaned and ground and its seat be also cleaned and groundas may be desired, with the least pos sible expense My invention isillustrated in the accompanying drawings, wherein Figure 1 is asectional view from a valve casing with my device attached. Fig. 2, is aplan on the line 2-2 of Fig. 1.

Like parts are indicated by thesame numher in all the figures. I p

1 is the engine, 2 the valve casing containing the two chambers. 3, 4,and the valve 5 therein. v

6 is a screw-threaded opening in the top of the chamber has beenremoved.

7 is a downwardly depending stem on the valve 5. This stem passes downthrough a cup shaped portion 8 on the lower part of the valve case andis surrounded by the spiral spring 9 which rests at its lower end uponthe pin 10. Thus the spring is kept taut and the valve 5 kept firmly inits position on its seat. When the valve and seat are to be treated theconnection at 6 is removed and then my device can be applied.

My device consists of the lever arm 1 1 pro-' vided with a handle 12 andpreferably upwardly curved at 13 and provided with a series ofperforations 14 whereby it may be adjustably connected by means of thepin 15 with the stem 16 which has the perforations 17 and the disk 18 atits lower end to bear against the top of the valve.

19 is a plate provided with a bifurcated end 20 to receive the stem 7and the lower end of the spring 9. This plate is provided with a seriesof holes 21 anda series of transverse holes 22. Through one of, theholes 21 I may be inserted the cylindricalend of the bar The lower endof this bar isperforated as indicated at 24 and a pin 25 is adapt ed topass through two of the holes 22 and the perforation 24 to hold the barin proper relation'to the plate.

bar 23 is bifurcated and adapted to receive between its two parts thelever arm 11. It is perforated at 26 to permit the passage of thepin 27which also passes through one of the holes 14 in the lever arm, thussecuring the lever arm and bar together.

28 is a rod having the upper bifurcated end 29 through whoseperforations passes a pin 30 which also passes through correspondingholes in the lever arm 11 to hold the arm and rod together. The lowerend of the rod is screw threaded at 31 and is adapted to pass through ahole in the plate at 32 and is provided with a lower nut :3. Applied tothe screw threaded portion of the consisting of two parts 34 and 35pivoted together and screw threaded within. On the part 35 is secured bythe pin 36 a spring 37 3 from whence the connection" which terminates inan eye This spring passes around the two parts of the nut and iolds themnormally together. If forced open it permits them to separate, whereuponthe nut may be moved up or down the thread without turning thereon. Theparts are shown in their normal position in Fig. 2-.

It will be understood that I have simply shown one form of my device. Mydrawing is to be taken as in a sense diagrammatic.

The use and operation of my invention are as follows: Assuming that thevalve constituted as shown is to be removed or the valve or seat cleanedor ground, I proceedin the following'mannerz My device. is put in theposition indicated. 'The stem 16 is passed down through the opening at 6and the plate 18 is brought against the top of the valve 5. The plate 19is brought iii-position so that the bifurcated end 20' surrounds thestem 7 and bears against the lower part of the spring 9 which is held inposition by the key 10. When the spring is as indicated in full linesthe valve is held firmly on its seat. Since the lever arm and the plateare held toether the bar 23, leaving the handle of the iaver arm in theposition shown in dotted lines, will raise the parts in the positionshown in. dotted lines, provided the outer end of the plate 19 be helddown. This may be done by hand. This will compress the spring againstthe case and take the pressure ofi of the key 10. The parts may beretained in this position by running down the two part nut until itengages the top of the plate 19, whereupon the parts will be locked together. The key 10 may now. be with- The upper end of the drawn. Thedevice should then be loosened too and the valve 5 With its' stem7, canbe removed and receive such treatment as may be desired. A similarapplication of the deviee is-required when the key 10 is to be replacedand the spring 9 brought into operation to foreethe valve againstits-seat.-

" "I claim:

everarm pivoted to the stem, an

' 1. In a valve jaek, the combination of stem to rest upon the to of thevalve, Wiltlifi plate to engage the va ve seating s ring,-a

I neeting bar between the lever arm and the plate.

2. In-a valve jack, the combination of a stem to rest upon the top ofthe valve, with a plate to engage the valve seating spring, a

leveinarm plvoted to the stem, a conneetin bar betweenthe lever arm andthe-plate, an i a .connecting rod with a lock nut whereby the lever armand plate are locked in rigid relation; v p

3. In a valve jack, the Combination of a stem to rest upon the top ofthe valve, with a. 'bifiarcated plate to receive the valve-stem andengage thelower end of. the valve seating Y late to.e

a con? spring, a lever armv pivoted to the stem, and a'lconneeting barbetween the lever arm and ate. p 4. In a valve jack, the-combination ofa stemto rest upon the top of the valve, with a age the valve seatingspring, a ever arm pivoted to the stem,'aconnectin bar between the leverarm and the plate, an a connecting rod with a lock nut whereby the leverarm and plate are locked in rigid relation; said rod being screwthreaded, and said nut oomposed of-two parts pivoted and held togetherby aspring. 5. In a valve -jack, thevcombination' of a lever arm and aplate approximately parallel to each other, with a stem pivoted to thelever arm and-adaptedto engage a fixedpart,

the plate adapted to engage the lower end ofthe fvalve seatingsprin anda bar connect ing the lever arm and p ate.

" ERNEST STEVENS.

Witnesses:

JAMES T. Ross,-

- ABBIE E. JOHNSON.

